Coherent control of optical phonons in GaAs by relative-phase-locked optical pulses under perpendicularly polarized conditions

Abstract

Coherent control of the optical phonons in GaAs is realized via paired femtosecond pulses that are relative phase-locked and have perpendicular polarizations. To investigate polarization effects, only phonon interference occurs, which contrasts previous experiments with parallel-polarized pulses, which produced as well electronic interference. The results suggest that for an n-GaAs(001) sample the diagonal components of the Raman tensor determinate in the generation of coherent longitudinal optical phonons.